Why do some people say "July is full of fire"? What does July filariasis mean?

The word "July filariasis" was first found in the Book of Songs, including "July filariasis, September clothes" and "July filariasis, August reed". The "fire" in "filariasis" refers to Antares, which was called "fire" in ancient times, that is, the alpha star of Scorpio. It is said that China set up a fire official post in Zhuan Xu more than 4,000 years ago to observe this star. "Streaming fire" means that Mars moves westward. The "dog" in the "dog wind" refers to the dog land, which is now Binxian County, Shaanxi Province, located about 0/00 km north of xi 'an Anxi/Kloc. The "July" in Fire in July is the summer calendar, which is roughly equivalent to August and September in the solar calendar and July in the summer calendar. This explanation can be found in Zheng Xuan's Biography of Mao Poetry in Han Dynasty and Kong's Justice of Mao Poetry in Tang Dynasty. According to this, some contemporary people translate "fire starts in July and clothes are given in September" into "Mars is full in July and women make cold clothes in September". However, some people have put forward different views on this, thinking that the original intention in the Book of Songs may really mean that the weather is hot, saying that "July is still very hot, and September is already crisp in autumn". Because the Book of Songs was written in the Zhou Dynasty, the time of poetry creation included in the Book of Songs may be earlier than that of Yin Shang Dynasty. From the Shang Dynasty to the Spring and Autumn Period, except for a short cold period in the early Western Zhou Dynasty, it was warmer most of the time, and the temperature was 2 degrees Celsius higher than it is now. It may be very hot in July in the summer calendar, and the poems in the Book of Songs are collected from the people. It is not known whether its creator knew the idea of "big Mars". Zheng Xuan and Kong live in a cold climate. In order to explain the Book of Songs, they adopted the saying that "Big Mars leans to the west". Although some people questioned the original intention of "July filariasis" in the Book of Songs, for a long time, the ancients did understand "July filariasis" as the weather turned cold. After modern China adopted the solar calendar, people gradually used the term "fire in July" to describe the hot weather. Although it is pointed out that this usage is wrong, more and more people still use the term "hot weather".